About 217,000 residents in Jefferson and Orleans parishes were still without power for the fourth day after Hurricane Isaac's winds and rains pummeled the Gulf Coast.

By early evening Saturday, more than half of electricity customers in Orleans Parish - which is served by Entergy New Orleans and Entergy Louisiana - were without power, about 107,610 homes and businesses still in the dark, according to the Entergy Storm Center website, which provides updates on power outages in New Orleans and across the region.

Isaac's high winds and heavy rains also caused widespread power outages elsewhere across the region.

Jefferson Parish, which is served by Entergy Louisiana, had about 109,600 customers without power this evening, down from 112,460, or about 54 percent of the parish, earlier that morning

In St. Bernard Parish, about 9,380 electricity customers were still in the dark; in Plaquemines, about 11,760; in Lafourche, about 16,310.

In St. John the Baptist, where flood waters forced thousands of residents to evacuate Thursday, about 15,470 homes and businesses were experiencing outages; in St. Charles, the number was around 11,910.

Entergy Corp. reported about about 330,470 of its customers throughout Louisiana did not have electricity, down from a peak of 769,000.

Pineville-based Cleco Power, which serves customers on the north shore, said flooding had hampered restoration efforts in some parts of St. Tammany Parish, where about 5,820 homes and businesses were without power at 6:30 p.m., down from 17,530 about 12 hours earlier.